GB528474A - Improvements in combination of high-pressure metal-vapour electric discharge lamps with circuit elements for operating them - Google Patents

Improvements in combination of high-pressure metal-vapour electric discharge lamps with circuit elements for operating them

Info

Publication number
GB528474A
GB528474A GB13707/39A GB1370739A GB528474A GB 528474 A GB528474 A GB 528474A GB 13707/39 A GB13707/39 A GB 13707/39A GB 1370739 A GB1370739 A GB 1370739A GB 528474 A GB528474 A GB 528474A
Authority
GB
United Kingdom
Prior art keywords
lamp
discharge lamps
pressure metal
switch
operating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB13707/39A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Thomson Houston Co Ltd
General Electric Co PLC
Original Assignee
British Thomson Houston Co Ltd
General Electric Co PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Thomson Houston Co Ltd, General Electric Co PLC filed Critical British Thomson Houston Co Ltd
Publication of GB528474A publication Critical patent/GB528474A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/06—Starting switches thermal only
    • H05B41/08—Starting switches thermal only heated by glow discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/56—One or more circuit elements structurally associated with the lamp

Landscapes

  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

528,474. Supply systems for discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., and GENERAL ELECTRIC CO., Ltd. May 8, 1939, No. 13707. Convention date, May 27, 1938. Drawings to Specification. [Class 38 (iv)] [Also in Group XL] A high-pressure metal-vapour lamp is combined with at least two impedances, not incandescent filaments, and switching means is provided whereby these impedances can be differently associated with the lamp, so that the impedance in series with the lamp is less during some part of the running up period than when the fully operating condition is attained. In one form a tapped choke is placed in series with the lamp and a bimetallic switch short-circuits one part of the choke ; when the heat of the lamp opens the switch contacts the short-circuit is removed. In another form, the lamp lead contains two chokes in parallel, one of which is switched out by a bimetallic element. The switch may be inside or outside an outer jacket surrounding the lamp and may be operated by hand. The lamp is supplied from mains. Specification 397,182, [Group XL], is referred to.
GB13707/39A 1938-05-27 1939-05-08 Improvements in combination of high-pressure metal-vapour electric discharge lamps with circuit elements for operating them Expired GB528474A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE528474X 1938-05-27

Publications (1)

Publication Number Publication Date
GB528474A true GB528474A (en) 1940-10-30

Family

ID=6553704

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13707/39A Expired GB528474A (en) 1938-05-27 1939-05-08 Improvements in combination of high-pressure metal-vapour electric discharge lamps with circuit elements for operating them

Country Status (1)

Country Link
GB (1) GB528474A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1119410B (en) * 1957-06-25 1961-12-14 Patra Patent Treuhand Ignition and operating device for alternating current-fed discharge lamps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1119410B (en) * 1957-06-25 1961-12-14 Patra Patent Treuhand Ignition and operating device for alternating current-fed discharge lamps

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